I used to train in karate there with ZSKA, under the sensei (now kyoshi 8th dan) John Richards, who was built like a brick out house.
It was proper old school discipline, press ups on your knuckles, standing in line in silence for inspection.
I remember using the changing rooms at the same time as the 5 a siders, John would walk in with his black belt on, and the place would fall silent.
Always thought it was a great place for indoor sports.